Class / Patent application number | Description | Number of patent applications / Date published |
310156320 | Including an axial air gap | 85 |
20080278019 | Magnetic Force Rotation Device - A magnetic force rotation device includes a rotor and a stator. The rotor is provided with a plurality of magnetic assemblies containing permanent magnet. The plurality of magnetic assemblies are arranged along the circumferential direction of the rotating shaft to form a wheel-shaped ring, and each magnetic assembly is provided with two magnetic poles. The stator is provided with a plurality of magnetically isolated electromagnets coaxially arranged. The electromagnets form a wheel-shaped ring around the rotating shaft, and each electromagnet is provided with paired poles. The wheel-shaped ring of the stator is at least party surrounded by the wheel-shaped ring of the rotor, so that each pole of the paired poles of the electromagnets of the stator corresponds to one magnetic pole of the two magnetic poles of the magnetic assemblies of the rotor respectively. Two axial component air gaps are provided between the rotor and the stator. One of the above two axial component air gaps and two radial component air gaps are provided between one of the paired poles of the electromagnets of the stator and one corresponding magnetic pole of the two magnetic poles of the magnetic assemblies of the rotor. | 11-13-2008 |
20080296988 | Rotating Electric Machine and Electrically Driven Vehicle - A rotating electric machine whose output characteristics can be easily and freely adjusted and varied even in operation. The rotating electric machine is received in a housing of an electrically driven two-wheeled vehicle. A rotating shaft is connected to a rotor so as to form an axle. A stator is positioned opposite a rotor. A movable member is connected to a rotating member rotated about the rotating shaft by a regulating motor. The movable member is moved in the axial direction of the rotating shaft by the rotation of the rotating member. This movement causes the rotor to be rotatingly moved in the axial direction o the rotating shaft, changing relative position of the rotor and the stator. | 12-04-2008 |
20080315699 | PM stepping motor - A PM stepping motor includes: a stator assembly composed of two stator units which are axially coupled to each other with a molding resin material, and each of which includes: inner and outer yokes each having a plurality of pole teeth; a bobbin including inner and outer flanges; and a coil wound around the bobbin, thus providing two such inner yokes, outer yokes, bobbins and coils in total; a rotor assembly which includes a shaft and a magnet, and which is rotatably disposed in the hollow of the stator assembly; and two bearings to rotatably support the shaft of the rotor assembly, wherein the two bobbins are formed of the molding resin material to be consolidated with the two inner yokes, and wherein a plurality of protrusions are formed of the molding resin material to extend integrally from the outer flange of each of the two bobbins. | 12-25-2008 |
20090033169 | MAGNETIC STRUCTURE AND MOTOR EMPLOYING SAID MAGNETIC STRUCTURE, AND DRIVER COMPRISING SAID MOTOR - Provided is a small motor superior in weight/torque balance. A phase stator | 02-05-2009 |
20090072649 | BRUSHLESS ELECTRIC MOTOR - The invention relates to a brushless electric motor, comprising a stator and an armature with armature teeth and permanent magnets in accumulative order, the armature being made from a laminated core with grooves and the armature teeth and grooves have a particular embodiment. The commutation time for the phase windings of the stator is selected such that subsequent control of the commutation time is not necessary, the torque being approximately equal at the start and the end of an armature stage. | 03-19-2009 |
20090127959 | ELECTRICAL DIRECT DRIVE FOR A ROLLER - An electrical roller drive which can be connected to a roller includes a disk-type motor with a secondary part in the form of a disk and with a primary part in the form of a disk. | 05-21-2009 |
20090140590 | PERMANENT MAGNET TYPE MAGNETIC POLE CORE STRUCTURE CAPABLE OF MINIMIZING COGGING TORQUE FOR ROTATING ELECTRIC MACHINE - A permanent magnet type magnetic pole core structure capable of minimizing the cogging torque for a rotating electric machine such as an electric motor or a power generator is disclosed. The rotating electric machine comprises: a magnetic pole core and an armature core. The magnetic pole core comprises a plurality of magnetic pole structures in a number of M, while each magnetic pole structure comprises at least one permanent magnet and can be used for defining two reference lines with an expanding angle sandwiched therebetween, and a periphery of the magnetic pole core enclosing the pole structure defining between the two reference lines is divided into a first arc surface, a second arc surface and a third arc surface. In an exemplary embodiment, the armature core comprises a plurality of slot structures in a number of S. The ratio of the amount of slot structure to the amount of the magnetic pole structure, i.e. S/M, is 3/2. With the aforesaid permanent magnet type magnetic pole core structure, the cogging torque of the rotating electric machine can be minimized. | 06-04-2009 |
20100033051 | ROTOR AND PERMANENT-MAGNET ROTATING ELECTRICAL MACHINE - A permanent-magnet rotating electrical machine includes a stator with an armature coil and a rotor arranged to rotate with a predetermined air gap with respect to the stator. The rotor includes a rotor core. Permanent magnets are arranged inside the rotor core on an outer circumferential side, or at the surface of the rotor core. The permanent magnets each are divided into a plurality of segments in an axial direction along a dividing face. The dividing face and an end face of the permanent magnet facing a circumferential direction form acute angles to define narrowed areas to suppress generation of eddy currents in the permanent magnets, prevent deterioration of the permanent magnets, and improve efficiency of the permanent-magnet rotating electrical machine. | 02-11-2010 |
20100187934 | AXIAL GAP ROTARY ELECTRIC MACHINE AND ROTARY DRIVING DEVICE - An axial gap rotary electric machine includes a rotor, an armature and a stator. The rotor is a magnetic body, which is capable of rotating in a circumferential direction about a rotation axis. The armature includes an armature coil opposed to the rotor from one side in a rotation axis direction parallel to the rotation axis. The stator causes the armature coil to interlink with a magnetic field flux from the other side in the rotation axis direction via the rotor. | 07-29-2010 |
20100207477 | AXIAL GAP ROTARY ELECTRIC MACHINE - An axial gap rotary electric machine includes a rotor, an armature and a stator. The rotor is capable of rotating in a circumferential direction about a rotation axis. The rotor includes permanent magnets and magnetic plates which cover those from the armature side. The armature includes an armature coil opposed to the rotor from one side in a rotation axis direction parallel to the rotation axis. The stator is opposed to the rotor from the other side in the rotation axis direction. | 08-19-2010 |
20110037335 | AXIAL MOTOR - The present invention relates to an axial motor, and more specifically, to an axial motor which has a simple structure and is easily assembled by inserting and holding core teeth in core teeth insertion holes circularly arranged on a yoke. The axial motor according to the present invention includes: a stator having core teeth which are insulated by insulators, arranged in a ring-shaped pattern, and have a coil wound thereon; and a rotor having magnets which are arranged in a ring-shaped pattern to face the ends of the core teeth in an axial direction and are supported by the rotor axis at the center of the rotor to rotate relatively with respect to the stator. The stator comprises: a plate yoke with a donut shape having an open center, wherein the core teeth insertion holes are arranged along the circumference of the plate yoke; core teeth, each of the core teeth having one end formed with a core pole and the other end inserted into each of the core teeth insertion holes, thereby being vertically fixed to the yoke; core teeth insulators which are made of insulation materials and wrapped around the exterior of the core teeth in such a manner that the core poles and the other ends of the core teeth are not covered; and a coil wound around the core teeth which are wrapped in the core teeth insulators. | 02-17-2011 |
20110080065 | ROTOR FOR AXIAL GAP-TYPE PERMANENT MAGNETIC ROTATING MACHINE - An axial gap-type permanent magnetic rotating machine comprises a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments circumferentially arranged on a surface of the rotor yoke such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of circumferentially arranged coils and disposed to define an axial gap with the rotor. In the rotor, each permanent magnet segment is an assembly of two or more divided permanent magnet pieces, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece. | 04-07-2011 |
20110241468 | ROTARY ELECTRIC MACHINE - A rotary electric machine configured with a stator, rotor, and permanent magnets disposed in an inverted V-shape that becomes gradually narrower from a side of a center of rotation of the rotor. The rotor is provided with a plurality of support portions that extend radially about the center of rotation, and gap portions are respectively formed in correspondence with the plurality of support portions at positions spaced by a predetermined distance from an edge portion of the permanent magnets in a flowing direction of magnetic flux between the permanent magnets and the stator. The gap portions are formed to have such a length that causes magnetic saturation during generation of low torque in a low-current state and that causes no magnetic saturation during generation of maximum torque in a high-current state in which electricity at a high current is supplied to the stator coil. | 10-06-2011 |
20120126653 | AXIAL-FLUX THIN-PLATE MOTOR - An axial-flux thin-plate motor is disclosed, which includes: a stator formed of an annular disk of silicon steel and comprising a plurality of teeth formed on one side of the annular disk, a plurality of insulation sleeves, each insulation sleeve having a shape which matches each tooth, and a plurality of coils, each coil formed around outside of each insulation sleeve, the coils connected and grouped to form n-phase windings in accordance with a phase number n of the motor; and a rotor formed of a ferromagnetic disk with a plurality of permanent magnets embedded on one side of the ferromagnetic disk. | 05-24-2012 |
20120153762 | SYNCHRONOUS MOTOR WITH PERMANENT MAGNETS - The invention relates to a synchronous motor with permanent magnets comprising a rotor ( | 06-21-2012 |
20120286613 | ASYMMETRIC STATOR TEETH IN AN ELECTRIC MOTOR - A permanent magnet motor includes a permanent magnet rotor, a stator surrounding the rotor having a plurality of teeth radially inwardly oriented toward a longitudinal axis of the stator wherein each tooth has a tooth length and a tooth tip surface geometry. An asymmetric air gap is defined by variations in the tooth lengths and tooth tip surface geometries. | 11-15-2012 |
20130033143 | Motor with Axial Air Gap - The invention discloses a motor with axial air gap including a base, a rotor and a coil unit. The base has a shaft-coupling portion. The rotor has a body coupled with a permanent magnet and a shaft. The permanent magnet has inner and outer circumferential faces, wherein the inner and outer circumferential faces are respectively projected onto the base as inner and outer circles. The shaft is coupled with the shaft-coupling portion. The coil unit is mounted on the base and has one or more coils. The permanent magnet and the coil unit face each other. At least one coil has a periphery intersecting with the inner and outer circles. The permanent magnet has a first radial length between the inner and outer circumferential faces. At least one coil has a second radial length. The first radial length is 10% to 90% of the second radial length. | 02-07-2013 |
20130134818 | THREE-PHASE AXIAL FLUX MOTOR AND MAGNETIC PATH ADJUSTING METHOD THEREOF - A three-phase axial flux motor is disclosed. The axial flux motor includes a stator, a rotor and a driving unit. The stator includes three coils. The rotor is pivotally disposed on the stator and includes a magnet which has a magnetizing state. The driving unit outputs a sinusoidal phase voltage to the coils. The magnetizing state of the magnet is corresponding to the inductance waveform and the IEF (induced electromotive force) waveform of the stator to let the waveform of the driving phase current to be an approximative sine wave. | 05-30-2013 |
20130147302 | ROTOR BARRIER SHAPING FOR DEMAGNETIZATION MITIGATION IN AN INTERNAL PERMANENT MAGNET MACHINE - A rotor core for an Internal Permanent Magnet (IPM) machine includes a cavity having a magnet disposed therein. The cavity defines an air slot adjacent a radially outermost edge of the magnet disposed therein. A leakage flux path extends across the air slot and connects opposing sides of the cavity. The leakage flux path is oriented in an approximate tangential relationship relative to an axis of rotation of the rotor core, and is angled relative to the radially outermost edge of the magnet disposed within the cavity to direct flux away from the magnet. The cavity further includes an air pocket disposed along a radial inner surface of the magnet relative to the axis of rotation, adjacent the air slot of the cavity. | 06-13-2013 |
20130313935 | BRUSHLESS MOTOR AND DISK DRIVE APPARATUS - A brushless motor includes a stationary unit and a rotary unit rotatably supported with respect to the stationary unit. The stationary unit includes an armature and a base member arranged to support the armature. The rotary unit includes a magnet, a hub made of a magnetic material and a rotor yoke made of a magnetic material. The armature includes a plurality of coil patterns arranged along a circumferential direction. The hub includes an inner lower surface, an outer lower surface and a recess portion. The recess portion is arranged between the inner lower surface and the outer lower surface and depressed upward. At least a portion of the magnet is accommodated within the recess portion. At least one of the inner lower surface and the outer lower surface is positioned above a lower surface of the magnet. | 11-28-2013 |
20140042859 | Axial Gap Rotating Electrical Machine - An axial-gap rotating electrical machine in which the distance of the air gap between a rotor and a stator can be accurately controlled is provided. A large diameter portion and a small diameter portion are formed on a rotating shaft and a stepped portion is formed therebetween. A rotor yoke is secured thereon and the position of the rotor is determined. The position of a bearing secured in a housing for rotatably supporting the rotating shaft is determined by a boss portion of the rotor yoke. The position of the housing is determined by the position of the bearing and the securing position of the stator is determined by a stepped portion formed on the inner circumference of the housing. Thus the position of the housing relative to the rotating shaft can be determined from the position of the rotor and the securing position of the stator can be determined. | 02-13-2014 |
20140062246 | ROTOR MAGNET POSITIONING DEVICE - A device for positioning a planar array of magnets within a permanent magnet electrical machine of the type having a rotor and stator with an air gap there between. The device includes a body made of non-ferrous material and having a first side which is attachable to the rotor and a second side which, in an assembled machine, faces the air gap. The first side of the body has a plurality of recesses therein for receiving a corresponding plurality of magnets. The recesses are shaped and arranged to separate the magnets from each other and maintain a consistent spacing between them. When the device is attached to the rotor the magnets are held in a fixed position against the rotor. The electrical machine may be a motor or a generator. | 03-06-2014 |
20140175931 | AXIAL FLUX PERMANENT MAGNET MOTOR - An axial flux permanent magnet motor includes a shaft, a rotor extending from the shaft in a radial direction, the rotor being rotatably mounted on the shaft, a magnet part disposed on the rotor to face downwardly in an axial direction, the magnet part having N poles and S poles, alternately disposed in a circumferential direction, a support member extending from the shaft in a radial direction, the support member being disposed below the rotor in the axial direction, and an electromagnet part disposed on the support member to face the magnet part in the axial direction. An axial distance between facing surfaces of the magnet part and the electromagnet part repeatedly changes in the circumferential direction. | 06-26-2014 |
20140210295 | Motor With Rotor Positioning Component - A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes a circuit board disposed between the base and the magnet unit, induction coils disposed on the circuit board and operatively associated with the magnet unit, a sensor unit disposed on the circuit board and spaced apart from the induction coils, and a rotor positioning component disposed on the second surface of the base and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating. | 07-31-2014 |
20140265700 | PERMANENT MAGNET ELECTRICAL MACHINES AND METHODS OF ASSEMBLING THE SAME - An electric machine comprising a permanent magnet rotor assembly is provided. The electric machine comprises a permanent magnet rotor assembly comprising a plurality of permanent magnets coupled to a rotor disk and a plurality of magnet shims coupled to the plurality of permanent magnets opposite the rotor disk. Each magnet shim of the plurality of magnet shims has a substantially complementary shape as a respective permanent magnet of the plurality of permanent magnets. The electric machine further comprises a stator core comprising a plurality of stator teeth that define a plurality of slots therebetween. At least one of the plurality of magnet shims is configured to direct magnetic flux from at least one of the plurality of permanent magnets to at least one stator tooth of the plurality of stator teeth. | 09-18-2014 |
20150364961 | BRUSHLESS MOTOR - A brushless motor in which a stator and a rotor are arranged relative to one another in a direction of a rotational axis is provided. The rotor may include a plurality of annularly arranged permanent magnets which are N-poles and S-poles that alternate with each other about the rotational axis of the rotor. The stator may include first teeth annularly arranged and facing the plurality of permanent magnets in the direction of the rotational axis, and a plurality of coils corresponding to the first teeth. | 12-17-2015 |
310156330 | With pole shoes | 2 |
20090218902 | ROTARY ACTUATORS - Embodiments of actuators ( | 09-03-2009 |
20130181565 | SCULPTED FIELD POLE MEMBERS AND METHODS OF FORMING THE SAME FOR ELECTRODYNAMIC MACHINES - A method, apparatus, article of manufacture and system for producing a field pole member for electrodynamic machinery are disclosed to, among other things, reduce magnetic flux path lengths and to eliminate back-iron for increasing torque and/or efficiency per unit size (or unit weight) and for reducing manufacturing costs. For example, a field pole member structure can either reduce the length of magnetic flux paths or substantially straighten those paths through the field pole members, or both. In one embodiment, a method provides for the construction of field pole members for electrodynamic machines. | 07-18-2013 |
310156340 | With a stator between a rotating flux return plate and rotor magnet | 2 |
20100207478 | TIP-LOCATED AXIAL-GAP (TAG) MOTOR/GENERATOR - A motor or generator having a rotor comprising an outer peripheral ring and having round bar permanent magnets with an axial length smaller than a diameter of the magnets embedded into the ring. The stator surrounding the motor and the stator comprising a stationary ring having a substantially flat sheet ring configuration including electrical conductors therein. The rotor comprises a flux-transfer ring rotating substantially as a unit with the outer peripheral ring. The flux transfer ring being substantially flat and facing the flat sheet ring. | 08-19-2010 |
20140354102 | Axial Flux Motor With Stator Pre-Load - A motor comprises a stator assembly, a rotor assembly having a stator core, and a stator cup adjacent the stator core. The inside surface of the stator cup comprises a plurality of aligned regions and a plurality of pressure regions. Each of the plurality of aligned regions is axially aligned with a corresponding one of a plurality of fastener-engaging regions of the stator cup. Each of the plurality of pressure regions is spaced from each of the plurality of aligned regions. A plurality of fastening portions operatively engages the fastener-engaging regions and operatively engages the stator core in a manner urging the stator core and the stator cup toward one another. Urging of the stator core and the stator cup toward one another by the plurality of fastening portions causes the stator core to exert pressure on the plurality of pressure regions. The pressure being exerted on the plurality of pressure regions by the stator core as a result of the fastening portions urging the stator core and the stator cup toward one another is greater than pressure being exerted on the plurality of aligned regions by the stator core. | 12-04-2014 |
310156350 | With single rotor magnet and plural stators | 21 |
20080246363 | CONTROLLER OF ELECTRIC MOTOR - A controller able to efficiently operate an electric motor of an axial air-gap type as an electric motor and an electricity generator is provided. | 10-09-2008 |
20090295245 | Axial gap motor - An axial gap motor includes a rotor and a stator, and the rotor includes within a rotor frame a plurality of main magnet pieces which are disposed in a circumferential direction in such a manner that their magnetized direction is in a rotational axis direction and magnetic members which are disposed on surfaces of at least one sides in the rotational axis direction of the main magnet pieces. The magnetic member has a fitting portion on one end face in a radial direction of the rotor thereof which is adapted to fit in the rotor frame. | 12-03-2009 |
20090295246 | AXIAL GAP MOTOR - A rotor includes a rotor frame having a plurality of ribs which are disposed at predetermined intervals in a circumferential direction and which extend in a radial direction, and a shaft portion and a rim portion which are provided at inside diameter sides and outside diameter sides of the plurality of ribs, respectively, main magnet portions which are disposed individually between the ribs which are adjacent to each other in the circumferential direction, and a plurality of sub-magnet portions which are disposed on at least one sides of the ribs in the rotational axis direction, and wherein a rigid portion is formed in an area where the sub-magnet portions are projected in the radial direction relative to an area where the rib is projected in the radial direction in a cross section of the rim portion taken along the rotational axis direction. | 12-03-2009 |
20100090555 | AXIAL GAP TYPE MOTOR - An axial gap type motor | 04-15-2010 |
20100141075 | AXIAL GAP MOTOR - An axial gap motor, including: a rotor having permanent magnet pieces; and a pair of stators that are oppositely arranged so as to sandwich the rotor in a rotation axis direction thereof, wherein: the rotor includes magnetic material pieces that are arranged along a circumferential direction thereof in a manner alternating with the permanent magnet pieces; the permanent magnet pieces have a magnetization direction in parallel with the rotation axis direction, with N poles thereof opposed to the stator on one side in the rotation axis direction, and with S poles thereof opposed to the stator on the other side in the rotation axis direction; and each of the magnetic material pieces includes magnetic material piece penetration portions that penetrate in a direction parallel to the rotation axis direction. | 06-10-2010 |
20100176679 | MAGNETIC FLUX CONTROLLABLE ROTATING ELECTRIC MACHINE SYSTEM - A rotor surface has magnetic salient poles and island-shaped magnetic poles alternately in circumferential direction, and the island-shaped magnetic pole is constituted so that a magnetic flux coming from an external source does not flow through. A magnetic excitation part magnetizes the island-shaped magnetic poles and the magnetic salient poles collectively in the same direction, and then control a flux amount flowing through an armature. The armature has armature coils that face the magnetic salient pole and the island-shaped magnetic pole simultaneously so that driving torque fluctuation or power generation voltage waveform distortion is controlled. The magnetic excitation part changes magnetization state of a field magnet irreversibly, or changes an excitation current to an excitation coil to control a flux flowing through the armature. | 07-15-2010 |
20100231079 | AXIAL GAP MOTOR - The present axial gap motor is provided with: a rotor that is rotatable around a rotation axis; and a pair of stators that are opposed to each other with the rotor interposed therebetween from both sides in a rotation axis direction which is parallel with the rotation axis of the rotor. The rotor includes: a plurality of main magnets arranged in a circumferential direction so that a flux direction is parallel with the rotation axis direction; a sub permanent magnet which is disposed in the vicinity of a circumferential end portion of the main magnet and is magnetized in a direction perpendicular to the rotation axis direction and a radial direction; and a magnetic member which is provided on a surface of at least one of the one side and the other side in the rotation axis direction of the main magnet. A length of the magnetic member in the rotation axis direction is larger than a length of the sub permanent magnet in the rotation axis direction. | 09-16-2010 |
20100289368 | ALTERNATOR WITH ANGULARLY STAGGERED STATOR STAGES - A synchronous alternator is provided including a stator portion having one or more disc-shaped plates each carrying coils in multiples of three, and by a rotor portion, coaxial to the preceding, including one or more disc-shaped plates each carrying permanent magnets in a pair number different than the number of coils of each stator disc. Each of the magnets of each rotor disc being oriented with inverted poles with respect to the preceding one and a rotor disc is placed in between each stator disc so that the rotation thereof results in a variation of linked magnetic flux with the coils, determining, the generation of alternated electrical current with variable frequency, so that the braking effect on the first coil is completely or partially balanced by an accelerating effect determined on the second coil. | 11-18-2010 |
20110057532 | Low-Inertia Direct Drive Having High Power Density - The invention relates to electric machines having permanent excitation, having a very high specific torque and a high power density when correspondingly supplied through power electronics. They are characterized by advantageous production possibilities using composite materials that can be pressed in molds. The nonferrous rotor construction and low required magnet mass results in an extremely low moment of inertia. | 03-10-2011 |
20110101813 | Rotary Single-Phase Electromagnetic Actuator - A single phase, rotary electromagnetic actuator comprising first and second stator assemblies, located in oppositely facing spaced apart positions along a common central axis, permits a magnetized disc magnet rotor to rotate about the common axis free of any magnetic attractive forces normally tending to move the disc magnet longitudinally along the axis, or alternatively to be located in a position to create a desired longitudinal attractive force. The entire assembly is maintained in operative positions by a circular belt which provides an inward facing lip on each side of which the stator assemblies are seated and which determines the magnetic airgap spacing for the disc. The invention may be implemented as a servo-actuator by the inclusion of an angular position sensor that uses the actuator rotor as the magnetic field emitter, and a receiver for the magnetic field and its contacts, located in the belt lip. | 05-05-2011 |
20110109185 | HIGH EFFICIENCY MAGNETIC CORE ELECTRICAL MACHINE - A magnetic core electrical machine includes a plurality of “U”-shaped stator yokes arranged circumferentially with respect to a rotor and either staggered to form a continuous flux return path or displaced relative to permanent magnets of the rotor in order to reduce cogging. Various mechanisms and/or circuits are provided to limit an output of the electrical machine at high speeds, and boost the voltage output at low speeds. | 05-12-2011 |
20110121676 | Vehicle disk motor with movable magnet poles - A brushless D.C. disk motor has one or more disk rotor assemblies and pairs of stator assemblies for each rotor assembly. Each disk rotor assembly has a disk and a plurality of permanent magnets distributed along two or more circular paths in the disk inboard of the peripheral edge of the rotor. Each stator assembly has a plurality of pole pieces and coils distributed along a mounting plate in corresponding circular paths. The disk is rotatably mounted to a support member; while the stator sub-assemblies are fixed to the support member. The coils are selectively activated by commutated power control signals generated in response to a vehicle condition parameter, such as vehicle speed or disk motor load, to optimize power drain from the source of electrical power in accordance with the value of the vehicle condition parameter. The stator assembly pole pieces are movably mounted on the stator mounting plate to improve motor efficiency. | 05-26-2011 |
20110260567 | MOTOR WITHOUT ARMATURE COIL - The motor contains a rotary disc, a number of magnets, a first stationary disc, a second stationary disc, a number of electromagnets, a casing member, and an electromagnetic circuit connected to the electromagnets. The magnets are uniformly distributed and embedded inside the rotary disc. The electromagnets are fixedly positioned on inner sides of the stationary discs facing the magnets. An axle runs through the rotary disc and is supported by the casing member by bearings. When electricity is applied, electrical current flows to an electromagnet, and a magnetic pole is thereby produced and interaction with the magnetic field of the magnet is activated. The rotary disc is turned by the magnetic expel or attraction between the electromagnets and the magnets of the rotary disc. As the rotary disc is turned, the axle is spun as well to deliver power. | 10-27-2011 |
20120091847 | ELECTROMAGNETIC STRUCTURE HAVING A CORE ELEMENT THAT EXTENDS MAGNETIC COUPLING AROUND OPPOSING SURFACES OF A CIRCULAR MAGNETIC STRUCTURE - An electromagnetic structure comprises a rotor assembly having at least one circular magnetic structure. The structure has opposing first and second surfaces that extend around a peripheral boundary region. A plurality of emission regions are disposed along said peripheral boundary region, with each emission region presenting poles having opposite polarities of a first polarity and a second polarity on the opposing first and second surfaces of the circular magnetic structure. Adjacent emission regions have alternating pole orientations such that each emission source having the first polarity is between two emission sources having the second polarity and each emission source having the second polarity is between two emission sources having the first polarity. A rotational element rotates the at least one circular magnetic structure about a rotation axis that is perpendicular to the opposing first and second surfaces. | 04-19-2012 |
20120262022 | AXIAL GAP MOTOR - The problem is to provide an axial gap motor using non-rare-earth magnets, as an axial gap motor capable of suppressing reduction in magnet torque and increasing reluctance torque. | 10-18-2012 |
20130009508 | AXIAL GAP TYPE BRUSHLESS MOTOR - Disclosed is a brushless motor ( | 01-10-2013 |
20130093278 | ROTATIONAL KINETIC ENERGY OUTPUT DEVICE - A rotational kinetic energy output device comprises a housing component, a rotational component and a magnetism generating component. The rotational component includes a rotational body pivotally connected to the housing component, and the rotational body has at least one magnetic element. The magnetism generating component includes a plurality of magnetizers and coils wound on the magnetizers, the magnetizers are disposed in the housing component and surround the rotational body. Each of the magnetizers has a first magnetic arm and a second magnetic arm extended respectively toward the rotational body, and the rotational body is disposed between the first magnetic arm and the second magnetic arm. Thereby, the rotational kinetic energy output device allows a force to be balancedly exerted on the rotational body and a thin shape is also achieved. | 04-18-2013 |
20130127284 | AIRCRAFT - An aircraft includes a propeller and an electric motor which is constructed in the form of a drive for the propeller. The electric motor includes at least two air gaps that can be used for cooling. The air gaps define an axis of symmetry which corresponds to an axis of rotation of the propeller. | 05-23-2013 |
20130257213 | DC Field Gradient Motor - A field gradient motor with a stator housing and first and second stator disks fixed to the stator housing for turning B-field flux lines 90 degrees toward a motor air gap of the field gradient motor. A shaft is rotatably retained by the housing, and a rotor has a hole and keyway for producing a nonferrous hole through the shaft. A plurality of tangentially magnetized triangular magnets are fixed to the rotor. In operation, the stator housing, the stator disks, the rotor, the permanent magnets, and the shaft cooperate with the coil produce an electromagnetic action of the motor. The stator housing can be an iron ring, and the first and second stator disks and the rotor can be steel. | 10-03-2013 |
20150069875 | DOUBLE AIR GAP, SPOKE TYPE VERNIER MACHINE - A vernier machine includes a rotor, permanent magnets mounted as spokes in pole pairs within the rotor, a first stator, a second stator, a first stator winding wound about the first stator to form a number of poles between a first set of terminals, and a second stator winding wound about the second stator to form the number of poles between a second set of terminals. The first stator and the second stator each include slots and teeth. The first stator and the second stator are mounted on opposite sides of the rotor with each separated by an air gap. The teeth of the first stator are offset from the teeth of the second stator by a half slot pitch relative to the rotor. A number of the pole pairs of the rotor is greater than the number of poles of the first stator winding. | 03-12-2015 |
20150295461 | Electromagnetic Generator - The invention relates to the field of electrical engineering, and more particularly to low-speed electrical generators, and can be used, in particular, in wind energy installations. In the electromagnetic generator, the rotor of which comprises a disk ( | 10-15-2015 |
310156360 | With plural sets of rotating magnets | 34 |
20080272666 | Arcuate coil winding and assembly for axial gap Electro-Dynamo Machines (EDM) - An axial gap EDM deploys as a stator coils a series of two parallel serpentine windings that each circumscribe an arc segment of a circle. Each arc segment that forms the stator winding assembly is powered as a separate phase. The two winding are readily formed by shaping one or more wire segment. Preferably the parallel winding are arranged to overlap with a half period rotational offset such that the radial directed serpentine segments of that are disposed above and below the stator disk are interlaced when viewed in projection through the disk. In one embodiment, each series of serpentine winding are separated by a gap so that they can be inserted on the stator disk from the edge. A separate rotor disk is adjacent each side of this stator disk. In another embodiment, each series of serpentine winding are separated by a gap, so they can be inserted to surround a single rotor disk which has two series of magnets disposed on opposite sides. | 11-06-2008 |
20080278020 | STATOR FOR PERMANENT MAGNET ELECTRIC MOTOR USING SOFT MAGNETIC COMPOSITES - A stator of an electrical machine operable as a motor or a generator, applicable to a radial-axial type machine. The stator includes a plurality of stator segments disposed circumferentially about an axis. Each segment has a generally wedge shaped core and a winding wound around the core. The winding is bent to have portions that are disposed on multiple planes. The core includes an elongated wedge tip portions aligned parallel to the axis and an outer radial face opposite to the tip portion. The multiple planes include at least one plane substantially normal to the axis and at least one plane tangential to the radial face. | 11-13-2008 |
20080290752 | Axial gap motor - An axial gap motor including a rotor and stators, wherein: the rotor is provided with a plurality of primary magnet portions, a plurality of auxiliary magnet portions, and a rotor frame; the rotor frame is provided with a plurality of ribs that extend in the radial direction of the rotor frame, and a shaft portion and a rim portion that are integrally connected with each other via the ribs, and the rotor frame houses the primary magnet portions and the auxiliary magnet portions; the primary magnet portions are provided with primary permanent magnet pieces; the auxiliary magnet portions are provided with auxiliary permanent magnet pieces; and each of cross-sectional areas of the ribs which is perpendicular to the radial direction increases from the rim portion side towards the shaft portion side in the radial direction. | 11-27-2008 |
20080290753 | MOTOR - A motor is basically provided with a stator, a rotor, a low permeability layer and a current control device. The stator includes a magnetic stator core and a stator winding. The rotor includes a rotor core and a plurality of permanent magnets arranged to form N and S poles of the rotor. The low permeability layer has a lower magnetic permeability than the rotor core and extends between each of the N and S poles in a direction generally parallel to the magnetic flux paths of the permanent magnets such that the permanent magnets and the low permeability are arranged to obstruct the magnetic flux between the N and S poles to provide a forward salient pole characteristic. The current control device produces a current whose phase is shifted such that the magnetic flux of the permanent magnets intensifies. | 11-27-2008 |
20090096310 | ELECTRICALLY POWERED DEVICE - The electrically powered device is provided. The electrically powered device includes: multiple stators structured to respectively have electromagnetic coils and position sensors; a shaft fastened to the multiple stators; and multiple rotors structured to respectively have permanent magnets and arranged to rotate around the shaft; wherein the multiple rotors are connected with a driven member driven by the electrically powered device. | 04-16-2009 |
20090195103 | Transmission Systems of Continuously Variable Transmission Ratio - A transmission system of continuously variable transmission ratio includes an input shaft, an output shaft, first and second electric motor/generators comprising first and second rotors and first and second stators, respectively, at least one of the motor/generators being of axial flux type, the first and second rotors being connected to rotate with respective shafts and the electrical connections of the first and second stators being connected together. A controller is arranged to control the flow of electrical power between the first and second stators. The stator of the said at least one motor/generator comprises two stator portions on opposite sides of the associated rotor, at least one of which is arranged to be movable in the axial direction. The said portion of the stator is rotatably secured to a spigot portion of the associated motor/generator extending in the axial direction by way of cooperating helical formations. An actuator is arranged to rotate one of the said portions of the stator and the spigot relative to the other, thereby moving the said portion of the stator in the axial direction with respect to the associated rotor. | 08-06-2009 |
20100084938 | REGENERATIVE MOTOR AND COIL - This invention presents a highly efficient electric motor which can he embodied in several configurations, including a standard motor, a hub motor, a linear motor, or other motor configuration. As a regenerative device, the motor may also act as a part-time or full-time electrical generator. There is provided a motor composed of a stator and a rotor. The stator has an array of coils arranged therein. The rotor has an array of magnets arranged therein. Each of the coils includes a first winding of wire wrapped around a core, and the wire has a non-circular cross-section. The wire can be a flattened wire. | 04-08-2010 |
20100283347 | NOVEL GANGED ALTERNATING CURRENT GENERATOR - A ‘ganged’ electrical generator with mechanical input into a rotor shaft that is used to produce alternating current (AC), the generator employing commonly used components arranged in a novel design to produce magnetic flux-induced current in copper or other conducting windings. The electrical generator is comprised, in part, of two or more rotors paralleling a vented stator and wherein the rotors contain fixed permanent magnets that, when rotated on the shaft of the generator, produce a magnetic field that induces a current in the windings and the permanent magnets are oriented in a manner incorporating features of a unipolar magnet so as to render the full magnetic field available to induce current which travels through the windings of the stator. The stators and rotors are constructed of modular portions for easy replacement and repair of faulty parts. | 11-11-2010 |
20110115327 | AC GENERATOR - AC generators are disclosed. Example generators may include a tubular air core, with high magnetic permeability and with a first and second end, the air core having a plurality of eddy current reducing slits passing from a radially outer surface of the air core to a radially inner surface of the air core; and a continuous coil made of conducting wire having a plurality of loops wrapped around the air core, the coil positioned between the first end and the second end of the air core. | 05-19-2011 |
20120013216 | CORELESS PERMANENT MAGNET MOTOR - A coreless permanent motor has a stator and a rotor rotatably mounted to the stator. One of the stator or the rotor has at least one winding disc ( | 01-19-2012 |
20120139379 | ROTATING MACHINE AND ROTOR THEREOF - A rotating machine is provided, including a rotor and a stator set. The rotor rotates around an axis, wherein the rotor includes a first permanent magnet set and a second permanent magnet set, the first permanent magnet set is magnetized in a circumference direction of the axis, and the second permanent magnet set is magnetized in an axial direction of the axis. The stator set corresponds to the rotor, wherein the stator set includes a radial stator member and an axial stator member, the axial stator member corresponds to the rotor in the axial direction of the axis, and the radial stator member corresponds to the rotor in a radial direction of the axis. | 06-07-2012 |
20120319519 | HIGH EFFICIENCY HIGH OUTPUT DENSITY ELECTRICAL POWER GENERATOR - An electrical power generator that increases both power generation efficiency and electrical power density. The generator includes: a plurality of disk surfaces; a plurality of stationary supports; and a rotating shaft affixed to each of the disk surfaces. Each disk surface is coupled to an array of magnets arranged as matching magnetic pairs on two adjacent disk surfaces so as to create a plurality of magnetic fields between the matching magnetic pairs. Each stationary support sustains an array of electromagnetic coils. Each coil is disposed in-between each of the matching magnetic pairs. Each rotating shaft rotates each of the matching magnetic pairs around the generator coils such that a time varying magnetic flux is provided and electrical power is generated in each of the generator coils. | 12-20-2012 |
20130049512 | AXIAL FLUX PERMANENT MAGNET SYNCHRONOUS GENERATOR AND MOTOR - An axial flux synchronous generator for wind turbine generators is provided including a shaft coupled to receive power with a power generating apparatus for the wind turbine; a rotor coupled rotatably to the shaft and having upper and lower disk-like faces affixed with a plurality of skewed permanent magnets having north-south (N-S) pole pairs and distantly arranged; an upper stator and a lower stator both having a plurality of slots formed similar to the skewed permanent magnets for taking windings of a coil, the upper stator being displaced relative to the lower stator by an electric angle in the range of 25˜30°; an upper housing and a lower housing for housing the rotor, the upper stator and the lower stator together; and a hub housing for fastening the upper housing and the lower housing to maintain constant gaps between the rotor and the upper stator and the lower stator. | 02-28-2013 |
20140319950 | Disc alternator or motor - The Disc Alternator or Motor utilizes a magnetic field orientation that is parallel to the armature. With this orientation, multiple disc's are utilized to increase square area of induction and to provide a stronger field induction into the coils of a disc alternator or inversely a greater magnetic rotational force on magnetic or ferris armature disc's of a disc motor. | 10-30-2014 |
20170237326 | SYNCHRONOUS ROTATION MOTOR OR GENERATOR PROVIDED WITH DIVERSE ROTORS AND/OR STATORS | 08-17-2017 |
310156370 | With single stator and plural sets of rotating magnets | 19 |
20090134730 | Electric Motor - An electric motor ( | 05-28-2009 |
20090140591 | ELECTRICAL SYNCHRONOUS MACHINE - An electrical synchronous machine, in particular for use as a drive machine in motor vehicle applications. A stator has an electrical winding arrangement for generating a rotating field. A rotor has magnetic flux generating means for generating a rotor flux with which the rotating field interacts. | 06-04-2009 |
20090295247 | Generator - There is provided a generator which produces electromotive forces in the same direction on all windings to prevent occurrence of leakage magnetic fields of the windings and lowering of the rotational forces of rotor plates due to the leakage magnetic fields from the windings and offers high efficiency without accompanying any circuit loads. The generator includes first windings | 12-03-2009 |
20100052458 | BRUSHLESS ELECTRIC MACHINE AND DEVICE COMPRISING SAID MACHINE - To provide a technique that improves an efficiency of using a magnetic field in a brushless electric machine. A brushless electric machine includes a first member having N sets (N is an integer of 2 or more) of electromagnetic groups, and a second member that has N+1 sets of magnetic field forming member groups and can move in a predetermined moving direction in relative to the first member. One set of the electromagnetic coil group and one set of the magnetic field forming member group are alternately disposed along a direction perpendicular to the moving direction. | 03-04-2010 |
20100148611 | ARMATURE CORE, MOTOR USING SAME, AND AXIAL GAP ELECTRICAL ROTATING MACHINE USING SAME - An armature core includes a core portion formed of a lamination of plural noncrystalline metallic foil bands and resin for bond-fixing the non-crystalline metallic foil bands, wherein the armature core is provided with at least two cut surfaces with respect to the lamination layers. Amorphous metal is used as the iron base of the non-crystalline metallic foil bands. The cut surfaces are perpendicular to the lamination-layers of the non-crystalline foil bands. For the amorphous core, a resin mold is formed. The contact portions between winding wires and amorphous are provided with edge roundness. Further, an axial gap motor using cut cores of amorphous lamination as stator cores is provided. Still further, the stator includes: a plurality of stator cores in a bar shape, the stator cores being disposed along circumferential direction, wherein the axial line of the rotor shaft is the central axis of the circumferential direction, and wherein an axial direction of the stator cores is along the axial line direction AX of the rotor shaft; a stator core holding member in a disc form, the stator having a plurality of holes or recessions that are substantially in the same shape as a cross-sectional shape of the stator cores and are arranged along the circumferential direction, wherein the axial line of the rotor shaft is the central axis of the circumferential direction; and coils wound around the stator cores, and wherein the stator cores are inserted in the holes or recessions of the stator core holding member and held by fixing in vicinities of respective central portions thereof, the central portions being with respect to the axial direction thereof. | 06-17-2010 |
20100194227 | POWER GENERATOR - A power generator produces electromotive forces in the same direction on all windings to prevent lowering of rotational forces of rotor plates due to magnetic fields. The generator includes first windings divided in plural number and wound around a fixed ring core in opposite directions. Second windings having the same constitution as the first windings are wound at 45° to the first windings. Capacitors are connected to one end of each of the first and second windings. A first rotor plate having first permanent magnets is provided on one surface of the ring core and a second rotor plate having second permanent magnets is provided on the opposite surface of the ring core. The two rotor plates are provided on a driving shaft so that the same magnetic poles thereof oppose each other and rotate to output electricity generated on the first and second windings via the capacitors. | 08-05-2010 |
20110273048 | SEGMENTED STATOR FOR AN AXIAL FIELD DEVICE - An axial rotary energy device including a segmented stator assembly having a plurality of segments arranged in an annular array. Each stator segment is constructed by stacking a plurality of PCB power conductor layers and a plurality of PCB series layers. Each layer having radial conductors extending from an inner via to an outer via. The vias electrically connect selected radial conductors of the series conductor layer and power conductor layer. Each power conductor layer includes a pair of positive and negative terminal vias for one phase of the electric current connected to selected outer vias. A daughter PCB layer electrically connects two adjacent segments together by having a first portion electrically connected to a negative terminal via located in one segment and a second portion electrically connected to a positive terminal via located in an adjacent segment together with a current conductor electrically connecting the two terminal vias together. | 11-10-2011 |
20120104890 | CONICAL MAGNETS AND ROTOR-STATOR STRUCTURES FOR ELECTRODYNAMIC MACHINES - Embodiments of the invention provide for conical magnets for rotors in electrodynamic machines, methods to design the same, and rotor-stator structures for electrodynamic machines. In various embodiments, a rotor-stator structure for electrodynamic machine can include field pole members and conical magnets. According to at least some embodiments, one or more of the conical magnets can include a magnetic region configured to confront one or more air gaps. The magnetic region can be substantially coextensive with one or more acute angles to the axis of rotation. The magnetic region can also include a surface positioned at multiple radial distances from the axis of rotation in a plane perpendicular to the axis of rotation. | 05-03-2012 |
20120133231 | Axial gap type rotating apparatus and axial gap type generator - The invention is to provide an axial gap type rotating apparatus for enabling downsizing and high output by causing the magnetic field to pass across the coils effectively in arranging the magnets and coils to oppose one another in the axial direction of the rotor shaft, in which in arranging pluralities of segment magnets and segment coils radially to oppose one another in the circumferential direction of the rotor shaft, each segment coil is comprised of an air-core coil having a non-winding portion in the center, a segment yoke piece of soft magnetic material is provided in the non-winding portion while being in non-contact with the winding, and the segment yoke pieces are arranged discontinuously in a separate state for each of non-winding portions of a plurality of segment coils. | 05-31-2012 |
20120146445 | Axial Flux Permanent Magnet Brushless Machine - An axial flux permanent magnet brushless machine according to the present invention includes: a housing; a stator comprising a stator core and a coil; two rotors each including a permanent magnet, and positioned so as to sandwich the stator in the axial direction with air gaps being left between the rotors and the stator; and a variable gap mechanism for changing distances of the air gaps; wherein the variable gap mechanism operates from a power source that supplies other rotational power than a rotational power of the axial flux permanent magnet brushless machine, and changes the distances of the air gaps by shifting the rotors in the axial direction. | 06-14-2012 |
20130088112 | MOTOR AND ROTOR OF A MOTOR - A motor includes a first rotor and a second rotor which are disposed at opposite sides of a stator, and each of the first rotor and the second rotor includes a plurality of modules, each including a pair of permanent magnets and a connection unit which connects ends of the permanent magnets. | 04-11-2013 |
20140049130 | SEGMENTED STATOR FOR AN AXIAL FIELD DEVICE - An axial rotary energy device including a segmented stator assembly having a plurality of segments arranged in an annular array. Each stator segment is constructed by stacking a plurality of PCB power conductor layers and a plurality of PCB series layers. Each layer having radial conductors extending from an inner via to an outer via. The vias electrically connect selected radial conductors of the series conductor layer and power conductor layer. Each power conductor layer includes a pair of positive and negative terminal vias for one phase of the electric current connected to selected outer vias. A daughter PCB layer electrically connects two adjacent segments together by having a first portion electrically connected to a negative terminal via located in one segment and a second portion electrically connected to a positive terminal via located in an adjacent segment together with a current conductor electrically connecting the two terminal vias together. | 02-20-2014 |
20140339944 | Electromagnetic Generator - The invention relates to the field of electrical engineering, specifically to low-speed electrical generators, and can be used in particular in wind energy installations. In the proposed electromagnetic generator the rotor is equipped with permanent magnets ( | 11-20-2014 |
20140375163 | Electromagnetic Generator - The invention relates to the field of electrical engineering, specifically to low-speed electrical generators, and can be used in particular in wind energy installations. In an electromagnetic generator having a rotor which is equipped with permanent magnets and a stator which comprises two parallel laminations | 12-25-2014 |
20150015108 | AXIAL GAP TYPE PERMANENT MAGNET ELECTRIC ROTATING APPARATUS AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, there is provided an axial gap type permanent magnet electric rotating apparatus including a first and second rotor. All a magnetic-pole directions of a permanent magnets of the first and second rotor are the same. A portion between two permanent magnets along a circumferential direction of each rotor is made of a magnetic material having substantially the same size as that of the permanent magnet such that axial-direction surfaces are the same between the permanent magnets on two sides in the circumferential direction. Between the first rotor and the second rotor, a magnetic flux flows along an axial direction while making a loop and passes through an armature. | 01-15-2015 |
20150054373 | COMMUTATORLESS AND BRUSHLESS DC MACHINE WITH STATIONARY ARMATURE AND METHOD OF OPERATING THE SAME - The invention relates to commutatorless, brushless DC machine with stationary armature and method of operating the same. The armature system is so deployed within magnetic flux producing arrangement having closed path for flux through magnetic substance except air gaps, that the two coil sides of an armature coil are facing like poles of two different magnetic field systems 1 and 2. During DC generator operation magnetic field systems are rotated or moved linearly in same direction with respect to stationary armature such that DC emf in each coil is sum of emfs of all insulated conductor which are alternatingly facing magnetic fields 1 and 2. During DC motor operation rotatable torque or linear force is generated by armature coil conductors carrying direct current on magnetic field systems 1 and 2, causing the rotation or linear movement of the above said two magnetic field systems in same direction. | 02-26-2015 |
20150091405 | ROTATING ELECTRIC MACHINE - An axial gap type rotating electric machine, having a stator with first tooth parts protruding in an axial direction and formed in a concentric arc-like manner, and a rotor with magnetic poles arranged in a distributed manner in the circumferential direction, and the magnetic poles include second tooth parts that protrude in the axial direction and are formed in a concentric arc-like manner, the second tooth parts being opposedly arranged so as to respectively engage with the first tooth parts with the intermediation of the air gap. The rotor is incorporated in the rotating member so as to be movable in the axial direction and so as not to be rotatable with respect to the rotating member. The rotating electric machine further includes an urging device that makes the air gap between the rotor and the stator adjustable. | 04-02-2015 |
20150123507 | Electric Generator for Wind Power Installation - An electric generator for windmill installations has a simple and efficient design, including a stator having a coil, a rotor having a base, a lid, and magnets. Rotor magnets are arranged on the lid and base along an annular line with a predetermined gap, and the coil, fixed by ring-shaped plates on both sides thereof, is mounted between the magnets with a minimal gap. The gap between the ring-shaped plates and the magnets is filled up with magnetic liquid. The coil is formed of three windings, located in radial grooves of a matrix, including outer and inner parts. The ring-shaped plates and matrix are made of dielectric non-magnetic material, the base and lid are made of magnetic-flux conductive material. The poles of adjacent magnets on the base and lid have opposite polarities. The poles of magnets mounted on the base face the magnets mounted on the lid with opposite polarities. | 05-07-2015 |
20160134180 | MULTI-LAYER SANDWICH-SHAPED ELECTRIC WHEEL - A wheel assembly comprising a wheel-shaped stator plate provided between two wheel-shaped rotor plates, all of which being co-axially attached to a rotation shaft. Each rotor includes a plurality of permanent magnets on the side facing the stator. The stator includes a plurality of coils corresponding in position to the permanent magnets of the rotors. Corresponding magnet faces of the different rotors have opposite orientations, and adjacent magnet faces of the same rotor have also opposite orientations. The rotors are attached to each other to maintain this configuration in place as the rotors rotate. The coils are configured so that each coil generates a magnetic field that extends across the surface of the stator plate to react with corresponding permanent magnets in both rotors, thus maximizing use of the magnetic field generated by the coils and causing the rotor plates to rotate simultaneously. A stream of cooling fluid may be run within the stator plate for reducing overheating. | 05-12-2016 |